Columbia Law School professor Timothy Wu has studied the rise of platform companies from Amazon.com Inc. to Alphabet Inc.'s Google LLC and helped devise policies to check the growing power of America’s Big Tech behemoths. Photo by Mikiko Hayashi

For more than two decades, lawyer, author and Columbia Law School professor Timothy Wu has studied the rise of platform companies from Amazon.com Inc. to Alphabet Inc. ‘s Google LLC and helped devise policies to check the growing power of America’s Big Tech behemoths.

These technology platforms have optimized convenience and entertainment, yet they are also among history’s most advanced tools to extract wealth and resources from the broader economy, Wu says.

“Consequently, as they become essential to everything, we are at risk of buildi

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